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c++timeiostreamstandard-librarystd

Is there anything called time in iostream or somewhere else in C++?

The codes compiles without error, but time is declared nowhere.

Fortunately, the error has been gone as I changed the name as mtime. But what is the nature of the error is? What is time?

The output of this program is 1. I wonder if there is anything called time in the file iostream or somewhere.

#include <iostream>
int main()
{
    std::cout << time << std::endl;
    return 0;
}
Solution

  • It is the address of a time_t time(time_t*) function as your <iostream> implementation includes the time.h header. The address will never be NULL and is implicitly convertible to boolean hence the result of 1. You are probably using g++ on Linux.